/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.trino.operator.aggregation;

import io.trino.spi.block.BlockBuilder;
import io.trino.spi.type.Type;

public final class BlockBuilderCopier
{
    private BlockBuilderCopier() {}

    public static BlockBuilder copyBlockBuilder(Type type, BlockBuilder blockBuilder)
    {
        if (blockBuilder == null) {
            return null;
        }

        BlockBuilder copy = blockBuilder.newBlockBuilderLike(null);
        for (int i = 0; i < blockBuilder.getPositionCount(); i++) {
            type.appendTo(blockBuilder, i, copy);
        }

        return copy;
    }
}
